The Role of Egg Production in the Etiology of Keel Bone Damage in Laying Hens

Frontiers in Veterinary Science
Beryl Katharina EusemannStefanie Petow

Abstract

Keel bone fractures and deviations belong to the most severe animal welfare problems in laying hens and are influenced by several factors such as husbandry system and genetic background. It is likely that egg production also influences keel bone health due to the high demand of calcium for the eggshell, which is, in part, taken from the skeleton. The high estrogen plasma concentration, which is linked to the high laying performance, may also affect the keel bone as sexual steroids have been shown to influence bone health. The aim of this study was to investigate the relationship between egg production, genetically determined high laying performance, estradiol-17ß concentration, and keel bone characteristics. Two hundred hens of two layer lines differing in laying performance (WLA: high performing; G11: low performing) were divided into four treatment groups: Group S received an implant containing a GnRH agonist that suppressed egg production, group E received an implant containing the sexual steroid estradiol-17ß, group SE received both implants, and group C were kept as control hens. Between the 12th and the 62nd weeks of age, the keel bone of all hens was radiographed and estradiol-17ß plasma concentration was assessed at reg...Continue Reading

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Citations

Sep 18, 2020·Animals : an Open Access Journal From MDPI·Simon JansenSteffen Weigend
Jul 28, 2020·Animals : an Open Access Journal From MDPI·Christina RufenerMichael J Toscano
Sep 19, 2020·Animals : an Open Access Journal From MDPI·Käthe Elise KittelsenGuro Vasdal
May 20, 2020·Animals : an Open Access Journal From MDPI·Simon JansenSteffen Weigend
Nov 27, 2020·Animals : an Open Access Journal From MDPI·Käthe Elise KittelsenGuro Vasdal
Jul 12, 2021·Animal : an International Journal of Animal Bioscience·J GautronI C Dunn
Aug 14, 2021·PloS One·Ida C N ThøfnerJens Peter Christensen

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Methods Mentioned

BETA
X-ray
enzyme-linked immunosorbent assay

Software Mentioned

nlme
SAS
ImageJ
coxph
AxioVision

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